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spyfu.x402.paysponge.com

https://spyfu.x402.paysponge.com/
● healthy general

Returns keywords that a domain recently dropped out of top search rankings for, indicating SEO ranking losses

Category
general
Chains
—
Price
$0.0100 USDC / call

Quality grade

How grading works
C+ 51.6 / 100
Availability 20.0 / 20
Endpoint responded (HTTP 402)
Payability 10.0 / 15
  • ✓ Answers a real HTTP 402 challenge
  • ✓ Publishes a /.well-known/x402 descriptor
  • ✗ Payment address on record
  • ✗ Settlement network declared
  • ✗ Price declared
Demand 0.0 / 35
No payment address on record, so demand cannot be measured
Performance 10.0 / 10
Last probe answered in 184 ms (full marks at 200 ms or less)
Readiness 11.6 / 15
Agent readiness 77/100
Owner verified 0.0 / 5
Nobody has claimed this listing yet
Endpoint last checked 19 h ago. Availability and on-chain demand are both re-probed daily; the grade updates automatically on the next pass. This grade sets search order and leaderboards; the readiness score below is shown for reference only.

x402 readiness

B · 77/100

Readiness is how fully this listing follows its protocol and how it behaved in our probes over 30 days. It is shown for reference and does not move it in search. Search order and leaderboards use the separate quality grade (here C+, 51.6/100), which weighs availability, payability and on-chain demand. How the two differ

Valid payment requirements 0/10 No payment requirements on record.
Live 402 challenge 25/25 Paid endpoint answers with an HTTP 402 challenge (184 ms).
x402 version n/a x402 version not observed yet.
Signed descriptor n/a No x402 standard defines a signed descriptor.
Uptime (30 days) 15/15 23/23 probes succeeded over 30 days (100%).
Resource declaration 8/10 47 paid resources; 47 sampled lack a description.
Verified identity 5/10 Publisher descriptor (/.well-known/x402 or OpenAPI) on record; claim this listing to verify domain control.
Freshness + modern flags 5/5 seen in a source within 7 days; declares x402.
Security declaration n/a Payment is the access control for an x402 resource.
Applicable criteria total 75 points, scaled to 100.
Responsiveness: Responsive (184 ms; bands ≤2.5 s, ≤5 s, ≤8 s, slower; penalty only).
Payment evidence: x402_challenge — We sent a request and got a live HTTP 402 challenge. Also: x402_manifest, catalog_listing. Qualifies the payment claim; adds no points.
Measured 2026-11-11.
Nine criteria, the same as the A2A readiness score, read from our daily probe of the paid endpoint, its payment requirements and 30-day probe history. Signed descriptor and security declaration are n/a for x402 (payment is the access control), as is an x402 version we have not observed; the remaining points are scaled to 100. Grades: A>=90, B>=75, C>=60, D>=40, F<40. It also feeds 15 points of the x402 quality grade.

Compared with peers

Against 10,082 reachable x402 APIs in our daily snapshot (2026-11-12 06:46 UTC). Display only; it does not change search order.

Readiness
Higher than 50% of peers
This listing 77 · peer median 78
Latency
Faster than 56% of peers
This listing 184 ms · peer median 205 ms

Where it loses the most points, and how to win them back

  • Valid payment requirements −10 — Return complete payment requirements in the 402 challenge.
    Now: No payment requirements on record.
  • Verified identity −5 — Claim the listing and prove control of its domain.
    Now: Publisher descriptor (/.well-known/x402 or OpenAPI) on record; claim this listing to verify domain control.
  • Resource declaration −2 — Declare each paid resource with its input and output schema.
    Now: 47 paid resources; 47 sampled lack a description.

How many agent tools actually work · All statistics

Paid endpoints

47 resource(s) advertised by this origin. Each price below is that resource's own x402 price; the headline price is the range across them.

GET https://spyfu.x402.paysponge.com/apis/serp_api/v2/seo/getJustFellOffKeywords
GET https://spyfu.x402.paysponge.com/apis/keyword_api/v2/kombat/getCompetingSeoKeywords
GET https://spyfu.x402.paysponge.com/apis/cloud_ad_history_api/v2/domain/getDomainAdHistory
GET https://spyfu.x402.paysponge.com/apis/serp_api/v2/seo/getOrganicOutrankingKeywords
GET https://spyfu.x402.paysponge.com/apis/organic_history_api/v2/historic/getHistoricRankingsForKeywordOnDomains
GET https://spyfu.x402.paysponge.com/apis/competitors_api/v2/seo/getTopCompetitors
GET https://spyfu.x402.paysponge.com/apis/cloud_ad_history_api/v2/term/getTermAdHistory
GET https://spyfu.x402.paysponge.com/apis/serp_api/v2/ppc/getPaidSerps
GET https://spyfu.x402.paysponge.com/apis/cloud_ad_history_api/v2/term/getTermAdHistoryWithStats
GET https://spyfu.x402.paysponge.com/apis/competitors_api/v2/combined/getCombinedTopCompetitors
GET https://spyfu.x402.paysponge.com/apis/organic_history_api/v2/historic/getHistoricRankingsForDomainOnKeywords
GET https://spyfu.x402.paysponge.com/apis/keyword_api/v2/related/getAlsoBuysAdsForKeywords
GET https://spyfu.x402.paysponge.com/apis/keyword_api/v2/related/getKeywordExpansions
GET https://spyfu.x402.paysponge.com/apis/organic_history_api/v2/historic/getHistoricRankingsForDomain
GET https://spyfu.x402.paysponge.com/apis/serp_api/v2/seo/getNewlyRankedKeywords
GET https://spyfu.x402.paysponge.com/apis/domain_stats_api/v2/getDomainStatsForExactDate
GET https://spyfu.x402.paysponge.com/apis/keyword_api/v2/kombat/getCompetingPpcKeywords
GET https://spyfu.x402.paysponge.com/apis/serp_api/v2/seo/getWhereTheyOutRankYou
GET https://spyfu.x402.paysponge.com/apis/serp_api/v2/seo/getMostTrafficTopPages
GET https://spyfu.x402.paysponge.com/apis/competitors_api/v2/ppc/getTopCompetitors
GET https://spyfu.x402.paysponge.com/apis/keyword_api/v2/related/getAlsoRanksForKeywords
GET https://spyfu.x402.paysponge.com/apis/keyword_api/v2/related/getRelatedKeywords
GET https://spyfu.x402.paysponge.com/apis/keyword_api/v2/related/getTransactionKeywords
GET https://spyfu.x402.paysponge.com/apis/serp_api/v2/seo/getMostValuableKeywords
GET https://spyfu.x402.paysponge.com/apis/serp_api/v2/seo/getWhereTheyJustSurpassedYou
GET https://spyfu.x402.paysponge.com/apis/domain_stats_api/v2/getAllDomainStats
GET https://spyfu.x402.paysponge.com/apis/serp_api/v2/seo/getJustMadeItKeywords
GET https://spyfu.x402.paysponge.com/apis/keyword_api/v2/ppc/getMostSuccessful
GET https://spyfu.x402.paysponge.com/apis/serp_api/v2/seo/getLostRanksKeywords
GET https://spyfu.x402.paysponge.com/apis/serp_api/v2/seo/getTopPages
GET https://spyfu.x402.paysponge.com/apis/serp_api/v2/seo/getSeoKeywords
GET https://spyfu.x402.paysponge.com/apis/serp_api/v2/seo/getGainedClicksKeywords
GET https://spyfu.x402.paysponge.com/apis/serp_api/v2/seo/getGainedRanksKeywords
GET https://spyfu.x402.paysponge.com/apis/domain_stats_api/v2/getBulkDomainStats
GET https://spyfu.x402.paysponge.com/apis/domain_stats_api/v2/getActiveDatesForDomain
GET https://spyfu.x402.paysponge.com/apis/keyword_api/v2/ppc/getNewKeywords
GET https://spyfu.x402.paysponge.com/apis/serp_api/v2/seo/getSerpAnalysisKeywords
GET https://spyfu.x402.paysponge.com/apis/serp_api/v2/seo/getLiveSeoStats
GET https://spyfu.x402.paysponge.com/apis/keyword_api/v2/related/getKeywordInformation
GET https://spyfu.x402.paysponge.com/apis/serp_api/v2/seo/getLostClicksKeywords
GET https://spyfu.x402.paysponge.com/apis/serp_api/v2/seo/getNewTopPages
GET https://spyfu.x402.paysponge.com/apis/keyword_api/v2/related/getQuestionKeywords
GET https://spyfu.x402.paysponge.com/apis/domain_stats_api/v2/getMatchingDomains
GET https://spyfu.x402.paysponge.com/apis/accounts_api/v2/usage/month/:usageDate/method
GET https://spyfu.x402.paysponge.com/apis/accounts_api/v2/usage/month/:usageDate
GET https://spyfu.x402.paysponge.com/apis/accounts_api/v2/usage/month/:usageDate/daily
GET https://spyfu.x402.paysponge.com/apis/domain_stats_api/v2/getLatestDomainStats

How to call

cURL · x402-fetch / x402-axios will auto-handle 402
curl -sS -i -X GET https://spyfu.x402.paysponge.com/  # expect HTTP 402 Payment Required (about $0.01/call)
/.well-known/x402.json
https://spyfu.x402.paysponge.com/.well-known/x402

Listed in

Directories this entry was found in.

zero since 2026-10-22